The standard power of your Renault Scenic 1.9 DCi 120hp vehicle is factory 120 hp / 270 nm. After Renault Scenic chip tuning custom vehicle software, your vehicle will gain +35 hp / +70 nm additional power and reach a total power of 155 hp / 340 nm. Since there will be no change in the exhaust emission values of your vehicle, there will be no smoke in your vehicle.